New York Yankees: Do they need immediate rotation help?

We will not learn in the spring whether Greg Bird (first base) and Aaron Judge (rightfield) will be able to hold down their positions long-term. New York's bigger question, for the moment, is the state of its rotation, which is full of risk at the top (Masahiro Tanaka, Michael Pineda and CC Sabathia) and uncertainty at the bottom (Luis Severino, Luis Cessa, Bryan Mitchell, Chad Green, Adam Warren).